题目:
题解:
cpp
class MedianFinder {
multiset<int> nums;
multiset<int>::iterator left, right;
public:
MedianFinder() : left(nums.end()), right(nums.end()) {}
void addNum(int num) {
const size_t n = nums.size();
nums.insert(num);
if (!n) {
left = right = nums.begin();
} else if (n & 1) {
if (num < *left) {
left--;
} else {
right++;
}
} else {
if (num > *left && num < *right) {
left++;
right--;
} else if (num >= *right) {
left++;
} else {
right--;
left = right;
}
}
}
double findMedian() {
return (*left + *right) / 2.0;
}
};